Wojciech Braszczok, left, with face covered, leaves the courthouse in New York, Wednesday, Oct. 9, 2013. Braszczok, an undercover police detective, was charged with gang assault in a motorcycle rally that descended into violence in New York.

The officer, who was off-duty at the time of the incident, was an active participant in the mob of motorcyclists who chased and terrorized SUV driver Alexian Lien and his passengers, which included his wife and his young daughter, the assistant district attorney said.

Braszczok, a 10-year-veteran of the NYPD, waited four days before coming forward to the NYPD and he allegedly made false statements about his involvement.

Braszczok's lawyer, Phil Karasyk, said there is video evidence that proves his client never got within 12 feet of the victim, but prosecutors said the video shows the officer "continues to terrorize the family" by continuing to chase the SUV and repeatedly hitting the passenger window and door of the SUV.

Karasyk said the case was a mischief case but became an assault case because his client is a police officer.

Police have said they are questioning Narcotics Detective Samir Gonsalves who also took part in the motorcycle ride.

Rosalyn Ng, Alexian Lien's wife, and Alexian Lien

CBS New York

To date, at least six people have been arrested for their alleged involvement in the beating of Lien, including 32-year-old Clint Caldwell, who was taken into custody late Tuesday night and charged with gang assault.

The melee seriously injured at least one biker and left the driver of the SUV, a 33-year-old father, beaten in the street.